EP0233334B1 - Munddusche - Google Patents

Munddusche Download PDF

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Publication number
EP0233334B1
EP0233334B1 EP86116451A EP86116451A EP0233334B1 EP 0233334 B1 EP0233334 B1 EP 0233334B1 EP 86116451 A EP86116451 A EP 86116451A EP 86116451 A EP86116451 A EP 86116451A EP 0233334 B1 EP0233334 B1 EP 0233334B1
Authority
EP
European Patent Office
Prior art keywords
control valve
valve
open position
outlet
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86116451A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0233334A1 (de
Inventor
Günter Petz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT86116451T priority Critical patent/ATE60214T1/de
Publication of EP0233334A1 publication Critical patent/EP0233334A1/de
Application granted granted Critical
Publication of EP0233334B1 publication Critical patent/EP0233334B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/0061—Air and water supply systems; Valves specially adapted therefor
    • A61C1/0084—Supply units, e.g. reservoir arrangements, specially adapted pumps

Definitions

  • the invention relates to an oral irrigator with a feed pump for the shower medium that can be driven by an electric motor, which is permanently in contact with a storage container via an inlet line and conveys to a handpiece with nozzle via an outlet line, in which the handpiece has a control valve that can be actuated by an actuator for optional opening or Has closing the drain opening and in which the drain opening has a pressure relief valve on a branch with a displaceable to the valve seat closure member which is held in the open position of the control valve against the drain pressure in the closed position and in the closed position of the control valve by moving the drain pressure to the open position and move is durable and connects the branch to the inlet pipe via a bypass.
  • a pressure relief valve with an essentially conical closure piece rests on a hose line provided between the feed pump and the spray nozzle.
  • the outlet of the pressure relief valve is connected to the feed line of the feed pump. If the pressure in the hose line increases due to a reduction or interruption of the flow rate at the spray nozzle, the pressure relief valve responds and connects the outlet of the pressure relief valve to the supply line.
  • the opening movements of the closure piece result in annoying striking noises.
  • the maximum pressure in the discharge line must be overcome by the closure piece there.
  • the object of the invention is to provide measures for reducing noise and to make the opening and closing movements of the closure piece more sensitive.
  • this object is achieved in that the closure piece of the pressure relief valve is formed by a piston which can be applied and held by spring force to the valve seat in the open position of the control valve, can be lifted in the closed position of the control valve by pressure build-up in the drain line against spring force from the valve seat, and can be lifted by acting on the end face facing the valve seat as a whole by the discharge pressure against spring force into the open position.
  • the spring force can be applied by a helical spring, the size of which is so matched that in the open position of the control valve, the spring force is greater than the discharge pressure, but less than the pressure build-up in the discharge line when the control valve is closed.
  • the prerequisites for on-off switching of the control valve in the handpiece at reduced pressure are given, which also eliminates annoying striking noises.
  • a small spring force is sufficient to apply the closure piece, while with the lifting of the closure piece, i.e. with the beginning of pressure build-up, the entire cross-sectional area is exposed to the discharge pressure, as a result of which the valve for connecting the discharge and inlet line via the bypass is opened quickly can be done.
  • the closure piece is arbitrary, e.g. can be designed as a piston or as a disc.
  • 1 denotes an oral irrigator housing on which a storage container 2 for shower medium is detachably placed.
  • the reservoir 2 is connected via an inlet line 3 to a feed pump 4 which can be driven by an electric motor 5.
  • the drain line for the shower medium is designated, which opens onto a handpiece 7 with an on-off switch (not shown) which can be actuated from the outside by a slide 8.
  • the handpiece 7 carries a nozzle tube 9.
  • the drain line 6 is assigned a valve 11 at a branch 10.
  • the valve 11 has a displaceable closure piece 12, which is designed as a disc or as a piston and closes or opens the branch 10 according to its position.
  • the closure piece 12 is accommodated against the force of a helical spring 13 in the valve housing 11 'and can be moved from the position in FIG. 1 to the position in FIG. 2.
  • the interior 14 of the valve housing 11 ' is in constant communication with the supply line 3 via a bypass 15.
  • the drain line 6 In the position of the closure piece 12 of FIG. 1, the drain line 6 is open by means of the slide 8 and, when the feed pump 4 is operating, shower medium can emerge from the nozzle pipe 9.
  • the branch 10 is closed by the closure piece 12.
  • pressure builds up in the drain line 6, which leads to a lifting of the closure piece 12 (FIG. 4).
  • the discharge pressure now takes effect on the entire cross-sectional area of the closure piece 12 and shifts the closure piece 12 into the position of FIG. 2.
  • the discharge line 6 is placed over the interior 14 of the valve housing 11 'and the bypass 13 to the inlet line 3.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Bathtubs, Showers, And Their Attachments (AREA)
  • Nozzles (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Safety Valves (AREA)
EP86116451A 1986-02-04 1986-11-27 Munddusche Expired - Lifetime EP0233334B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116451T ATE60214T1 (de) 1986-02-04 1986-11-27 Munddusche.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863603282 DE3603282A1 (de) 1986-02-04 1986-02-04 Munddusche
DE3603282 1986-02-04

Publications (2)

Publication Number Publication Date
EP0233334A1 EP0233334A1 (de) 1987-08-26
EP0233334B1 true EP0233334B1 (de) 1991-01-23

Family

ID=6293281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116451A Expired - Lifetime EP0233334B1 (de) 1986-02-04 1986-11-27 Munddusche

Country Status (3)

Country Link
EP (1) EP0233334B1 (enrdf_load_stackoverflow)
AT (1) ATE60214T1 (enrdf_load_stackoverflow)
DE (2) DE3603282A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4443137A1 (de) * 1994-12-03 1996-06-05 Bosch Gmbh Robert Verfahren zur Ermittlung der Federkraft einer Schließfeder beim Öffnen eines Ventiles, insbesondere eines Brennstoffeinspritzventiles, und Vorrichtung zur Durchführung des Verfahrens
AT500520B8 (de) * 2002-12-20 2007-02-15 W & H Dentalwerk Buermoos Gmbh Dichtsystem für motoren zum antrieb medizinischer, chirurgischer oder dentaler instrumente

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7327527U (de) * 1973-07-27 1975-09-11 Bosch R Gmbh Stroemungskanal fuer ein fluid mit durchstroemtem ueberdruckventil
US4182354A (en) * 1978-05-02 1980-01-08 U.S. ParaPlate Corporation Method and apparatus for flow diversion in a high pressure fluid delivery system
DE8014400U1 (de) * 1980-05-29 1980-09-04 Rowenta-Werke Gmbh, 6050 Offenbach Elektrische munddusche
DE3131995A1 (de) * 1981-08-13 1983-02-24 Petz Electro, 3185 Schmitten Kolbenpumpe, insbesondere fuer mundduschen
DE3342420A1 (de) * 1983-11-24 1984-05-30 Heinz 7752 Reichenau Büchner Ueberdruckventil fuer mundduschen fuer die steuerung und regulierung des wasserstrahles

Also Published As

Publication number Publication date
DE3677184D1 (de) 1991-02-28
ATE60214T1 (de) 1991-02-15
EP0233334A1 (de) 1987-08-26
DE3603282C2 (enrdf_load_stackoverflow) 1991-01-10
DE3603282A1 (de) 1987-08-06

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